Combined babbitting and finishing jig



March 10. 1925. 1,529,119

v. L. DU 5015 ET AL COMBINED BABBITTING AND FINISHING JIQ Fiied Nov. 6, 192:5

gwbzwfoz Zip Qwlv Patented Mar. 10, 1925.

UNITED STATES PATENT'OFIFI'CE.

VIRGIL L. DU BOIS AND CLARENCE E. CLIFTON, 0F TULSA, OKLAHOMA.

COMBINED BABBITTING AND FINISHING JIG'.

Application filed November 6, 1923. Serial No. 673,169.

To all whom it may concern:

Be it known that we, Vmen. L. DU BoIs and CLARENCE E. CLIFTON, citizens of the United States, and residents of Tulsa, county of Tulsa, and State of Oklahoma, have 1nvented certain new and useful Improvements in Combined Babbitting and Finishing Jigs, of which the following is a full and complete specification, reference being had therein to the appended drawings.

This invention relates to the babbitting and finishing of the bearings for crank shaft journals as found in gas engines,'pumps, compressors and the like. In devices of this character it is essential that the bearings be relined with Babbitt metal from time to time. It is also necessary that the new bearings be finished by boring. As these bearings are generally at least three in number, great care must be exercised to insure the proper alignment of the same.

It is an object of this invention to develop a device capable of use in both the babbitt casting step and the subsequent step of boring out the cast bearings.

It is also an object of this invention to simplify the device required to carry out the above two steps and to insure the uni formity and accuracy of the work done.

Other advantages resulting from our invention will be apparent from the following description of one form, in which:

Figure 1 is a plan view of the jig used in the babbitting step;

Fig. 2 is a plan view showing the same in the operation of boring out the cast bearm s' Ti g. 3 is a detail perspective view during babbitting, and

Fig. 4 is a side view of the locking nuts.

As illustrating one preferred form of our invention there has been shown in the drawings a frame or spider 5, conforming in general to the shape of the cylinder block 6 or an analogous casting of the crank case of a gas engine, pump, compressor or the like. This frame 5 is provided with a series of pins 7 passing through the sides of the frame 5 and projecting into the customary bolt holes found in the walls of the member 6. By means of the pins 7, the jig may be clamped readily to the machine part which it is desired to supply with new bearings.

A plurality of yokes or cross arms 8, 8'- extend between the sidesofthe-jigt and form bearings 9, 9.

The member 6 is shown to have an intermediate transverse partition 10 and end walls 11 andi12. .The partition and end walls each carry journal boxes 13.-- 1

Journaled in the bearingsS of the jig 5,

and passing through the journal boxes 13 I is a bar 14, which serves the purpose of forming cores during the babbitting'step and as a boring bar during the finishing step. Throughout the greater part of its length, the boring bar 14 hasa uniform cylindricalsurface as shown at 15,16 and 17. These" uniform cylindrical portions are so disposed as to occupy the journal boxes 13 when the bar is at its limiting position shown v inv Fig. 1. V I

Suitably spaced along the bar 14: and between the'portions 15, 16 and 17 arerecessed portions 18 and 19Q-A recessed portion 20 is adjacent the portion 17. The recessed portions 18, 19 and 20 are so spaced as to be brought opposite the journal boxes 13 simultaneously. i

Each of the recessed portions 18, 19 and 20 carry boring tools '21. I T

The boring tool lvtis'provided at oneend with a handle 22 by which the boring bar' may be rotatedin the bearings 9. A screwthread 23 is formed on the boring bar 1 1 as shown in the dra'wings,and constitutes the means for advancing the boring bar with respect to the work.

The jig 5 has at one end. converging arms 24, 24 carrying at their ends internally screw-threaded blocks 25, 25, by means of pivot pins 26, 26. The blocks 25, 25 are of such shape as to completely surround screw-thread 23 and are conical' as shown. The outer cylindrical surface of the blocks 25, 25 is screw-threaded to receive the lockiug nut 27. In Fig. 3 18. shown a detail of the boring bar in the posltion for forming a core 1n the journal box 13 during the babbitting' placed upon the member 6 With the pins 7 registering in the bolt holes of member 6. I 5th the blocks 25, released, the ng fiber 1a is m ved in bearing 9 tothe position shown in Fig. 1. This bringsthe Cylindrical p t iqes .51 16 and l Ji i e journalboxs 13. The blocks '25, 25 are then closed around screw-thread 23 and thelocking nut 27 fastened onthe blocks in order to hold the boring bar stationary.

The mold; members QS, 28 are then slid along boring bar orclamp around the same iQl' l ing molds of the desired. shape in-the partition '10 and the end walls lland. 12. The babbit-ting metal is'thenipoured. into the molds and the. device allow-ed to remain in this. position until :the 'babbittingmetal has solidified.

. ,After the nevvbearihgshave been cast,- the moldmembers 28, 28. are removed-and sur plus .babb t ing metal cleared away; The crank handle 22 i then rotated. .As the lia uille is rotated thefeedi screw23 is forced along the blocks 25 and consequently causes theboringf'tools- 21 to, pass alongfthe'inner surface oi the bearings' In thisvvay the bearings are bored out, theboringsnbeing tiojns, 18, 19; and 20.

a In this manner the jfig. servesthe purpose of establishing properly aligned cores in the journal. boxes duringtthe casting I step: as well as rapidly and eiiectively boring ;-out the bearings in the finishingstep; f

Yi vhile We: have shown" by ay 01E example.

removed alongithe relieved. or recessed por-' one form in which our invention may be y embodied, numerousehanges mayfbe made Without departing from the scope. of them vention as defined in the appended claims.

lVhat We claim as our inventionis: 21.. A combined babbitting and finishing jig consisting of. a, frame, hearings. in said frame and a combined fcore member and boring bar movable'longitudinally in said bearings.

2; A, combined 7 babbitt-ing. and finishing j jig consisting of a frame,bearings in said frame, a combined core member and boring bar movable longitudinally in sa d bearlngs, sa d bar having spaced reduced portions and cut-ting members carried in sa-idportions.

A combined babbitting and finishing jig consisting of a frame, bearings insaid frame and a boring bar movable long tudinally 1n said bear1n-gs, sa d bar having portions adapted to serve as cores during the casting v control the longitudinal n ioveme nt 'of'the' bar in said frame bearings.

6. A combined babbitting and finishing jig. consisting. of a frame having a plurality oi crossinembers, bearings in said members,

a split collar pivotally carried by said frame 111 alignment with said bearmgmsaid collar being internally screw-threaded, alocking' nut for the collar and acombined core member and boring bar journaled in saidbearings and engaged by said' collar.

7. A combined bab bitting and finishing jig consisting of a frame having a plurality 013' cross members, bearings 111 82116; members,

finishing f a combined core membenand boring bar in said bearings, cutting members mounted on said bar and means to advance said bar and members through said bearings.

In testimonywhereof, We liave'hereu'nt o afiixed' oursignatures. Y

vineiL L. DU BOIS. eminence CLIFTON. 

